San Bernardino shooters

San Bernadino shooters

Tashfeen Malik and Syed Rizwan Farook shot and killed 14 people and injured 21 others at the Inland Regional Center in San Bernardino, California on Dec. 2, 2015, before being shot to death by police.

The married couple are seen as they arrive in Chicago on July 27, 2014. Farook, right, was a 28-year-old restaurant inspector born in the U.S. to a Pakistani family. Malik was a 29-year-old immigrant from Pakistan, who entered the U.S. on a fiancé visa.

Credit: Obtained by CBS News

Tashfeen Malik

A photo of Tashfeen Malik taken at some point during her university years in Multan, Pakistan. Those who knew Malik described her as a "modern woman" who became deeply religious, though never an extremist.

On Dec. 7, 2015, the FBI said the couple were radicalized and had been for some time." Just before the shooting Malik pledged her allegiance to ISIS leader Abu Bakr al_Baghdadi in an online posting. The married couple responsible for the San Bernardino shooting participated in target practice once within days of the attack that killed 14 people. The couple used two altered AR-15 semiautomatic weapons and two pistols in the attack.

Credit: nc

Syed Rizwan Farook

An undated photo from an online dating website shows Syed Rizwan Farook, who was one of the shooters in the Dec. 2, 2015 shooting at the Inland Regional Center in San Bernardino, California.

Dar Al Uloom Al Islamiyah-Amer mosque

Authorities are investigating the San Bernardino, California, shooting as an "act of terrorism," Federal Bureau of Investigation assistant director David Bowdich said at a news conference.

Credit: Mike Blake/Reuters

Investigation

FBI investigators sort through contents of the garage of the suspects involved in the Wednesdays attack in the aerial photo in Redlands, California, Dec. 3, 2015.

Credit: REUTERS

SUV used in attack

The remains of a SUV involved in the Dec. 2, 2015 attack in San Bernardino, California Dec. 3.

Credit: Mario Anzuoni/Reuters

Al Uloom Al Islamiyah-Amer mosque

People leave after Friday prayers Dec. 4, 2015 at the Dar Al Uloom Al Islamiyah-Amer mosque, where shooting suspect Syed Rizwan Farook was seen two to three times a week at lunch time in San Bernardino, California.

Authorities are investigating the San Bernardino, California, shooting as an "act of terrorism," Federal Bureau of Investigation assistant director David Bowdich said at a news conference on Dec. 4.

Credit: Mike Blake/Reuters

Weapons used in attack

Weapons confiscated from the Dec. 2 attack in San Bernardino, California are shown in this San Bernardino County Sheriff Department photo released to Reuters Dec. 3.